Dear LAMMPS Users and Developers,
I am pleased to announce the 2026 LAMMPS stable release (version 30 September 2026) that was just made available for download on GitHub and on the LAMMPS homepage.
You can see the detailed release notes here:
The binary packages with the LAMMPS and the GUI now include LAMMPS-GUI version 3.1.1 which was released at the same time.
Standalone versions of the LAMMPS-GUI binaries are also available. Those now include a LAMMPS 30 September 2026 shared library. Since the LAMMPS library is loaded dynamically in these packages, it can be switched to a different version (e.g. a customized version) though the preferences, but at least version 2 September 2026 is required since it depends on features not available in older LAMMPS versions. Detailed release notes are here:
This year we had many changes and in the last months particularly many ports of styles to KOKKOS (its number of supported styles has more than doubled since last year) and OPENMP and also much more test coverage (almost double) which led to many bugfixes, especially for subtle data movement issues when running KOKKOS with GPUs but also in the general code, fixes for race conditions in OPENMP styles, missing bugfixes that were only applied to non-accelerated versions and much more.
There are already plenty of new features and enhancements waiting for the next feature release so the evolution of LAMMPS will continue. An analysis by tools of the Linux Foundation has classified the LAMMPS development as a project with excellent health: LAMMPS – Health Score, Contributors & Security | LFX Insights
I would like to thank everybody for their contributions and support of LAMMPS and hope that we can continue on the chosen path to improve and extend LAMMPS.